GB1384777A - Frequency modulator - Google Patents

Frequency modulator

Info

Publication number
GB1384777A
GB1384777A GB707272A GB707272A GB1384777A GB 1384777 A GB1384777 A GB 1384777A GB 707272 A GB707272 A GB 707272A GB 707272 A GB707272 A GB 707272A GB 1384777 A GB1384777 A GB 1384777A
Authority
GB
United Kingdom
Prior art keywords
frequency
modulator
spacing
memory
successive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB707272A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB1384777A publication Critical patent/GB1384777A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/02—Digital function generators
    • G06F1/03—Digital function generators working, at least partly, by table look-up
    • G06F1/0321—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/12—Modulator circuits; Transmitter circuits
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2101/00—Indexing scheme relating to the type of digital function generated
    • G06F2101/04—Trigonometric functions

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Electrophonic Musical Instruments (AREA)
GB707272A 1971-02-19 1972-02-16 Frequency modulator Expired GB1384777A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11699871A 1971-02-19 1971-02-19

Publications (1)

Publication Number Publication Date
GB1384777A true GB1384777A (en) 1975-02-19

Family

ID=22370483

Family Applications (1)

Application Number Title Priority Date Filing Date
GB707272A Expired GB1384777A (en) 1971-02-19 1972-02-16 Frequency modulator

Country Status (11)

Country Link
US (1) US3697892A (xx)
JP (1) JPS5117368B1 (xx)
BE (1) BE779389A (xx)
CA (1) CA942425A (xx)
DE (1) DE2207365C3 (xx)
ES (1) ES399905A1 (xx)
FR (1) FR2125554B1 (xx)
GB (1) GB1384777A (xx)
IT (1) IT949152B (xx)
NL (1) NL7201945A (xx)
SE (1) SE373473B (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2240014A (en) * 1987-03-04 1991-07-17 Nat Semiconductor Corp Frequency shift keying modulator.

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3958191A (en) * 1974-11-21 1976-05-18 International Business Machines Corporation Multi-line, multi-mode modulator using bandwidth reduction for digital fsk and dpsk modulation
GB1488433A (en) * 1974-11-21 1977-10-12 Ibm Dpsk modulator
DE2659512B1 (de) * 1976-12-30 1978-05-24 Wandel & Goltermann Verfahren und Schaltungsanordnung zum Erzeugen eines Digitalsignals zum Pruefen einer PCM-Endstelle
US4259648A (en) * 1979-07-11 1981-03-31 Bell Telephone Laboratories, Incorporated One-bit frequency-shift-keyed modulator
FR2519491A1 (fr) * 1982-01-07 1983-07-08 Signaux Entr Electriques Procede de generation de signaux periodiques, notamment de signaux modules par sauts de frequence ou de phase et generateur mettant en oeuvre le procede
US4602226A (en) * 1985-03-21 1986-07-22 General Electric Company Apparatus for the gated modulation of a radio-frequency carrier signal
US8373357B2 (en) * 2009-01-26 2013-02-12 Microchip Technology Incorporated Modulator module in an integrated circuit device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3095539A (en) * 1959-12-18 1963-06-25 Sylvania Electric Prod Digitally positioned wave filter
US3243703A (en) * 1962-05-24 1966-03-29 Gen Electric Interpolative scanner using scanned electron discharge devices having overlapping conducting intervals
US3292034A (en) * 1963-09-27 1966-12-13 Honeywell Inc Apparatus for synchronizing cathode ray deflection to a rotating antenna using digital techniques
DE1222974B (de) * 1965-02-04 1966-08-18 Siemens Ag Verfahren und Schaltungsanordnung zur UEbertragung binaerer Signale in hoeher codierter Form
US3393364A (en) * 1965-10-23 1968-07-16 Signatron Statistical delta modulation system
US3611209A (en) * 1969-12-11 1971-10-05 Bell Telephone Labor Inc Digital filter frequency shift modulator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2240014A (en) * 1987-03-04 1991-07-17 Nat Semiconductor Corp Frequency shift keying modulator.
GB2240014B (en) * 1987-03-04 1991-10-30 Nat Semiconductor Corp Frequency shift keying modulator

Also Published As

Publication number Publication date
SE373473B (xx) 1975-02-03
CA942425A (en) 1974-02-19
DE2207365A1 (de) 1972-08-24
DE2207365C3 (de) 1974-01-24
ES399905A1 (es) 1974-12-16
IT949152B (it) 1973-06-11
BE779389A (fr) 1972-05-30
US3697892A (en) 1972-10-10
NL7201945A (xx) 1972-08-22
JPS5117368B1 (xx) 1976-06-02
FR2125554B1 (xx) 1977-04-01
DE2207365B2 (de) 1973-06-28
FR2125554A1 (xx) 1972-09-29

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee